Grinding-roll.



' No.781,043. PATENTED JAN. 31,1905.

Q r T. W'OODRUMY' GRINDING-ROLL.

APPLICATION FILED JUNE 20, 1994.

l I I l I I I v NITED STATES Patented January 31, 1905.

PATENT OFFICE.

GRINDING-ROLL.

SPECIFICATION forming part of Letters Patent N0. 781,043, dated January 31, 1905.

Application filed June 20, 1904;. Serial No. 213,394. I

To all whom it may concern:

Be itknown that I, TnoMAs WooDRUM, a citizen of the United States, residing at Webb City, in the county of Jasper and State of Missouri, have invented a new and useful Grinding-Roll, of which the following is a specification.

This invention relates generally to grinding rolls, and particularly to that class employed in crushing lead and zinc ores.

The object of the invention is to simplify the construction of the roll, facilitate its attachment with its shaft, preclude possibility of the roll working loose from long continued employment thereof, and to improve and render more durable devices of the class designated.

With the above and other objects in view, as will appear as the nature of the invention is better understood, the same consists in the novel construction andoombination of parts of a grindingroll employed in crushing lead and zinc ores, as will be hereinafter fully described and claimed.

In the accompanying drawings, forming a part of this specification, and in which like characters of reference indicate corresponding parts, there is illustrated one form of embodiment'of the invention capable of carrying the same into practical operation, it being understood that the elements therein exhibited may be varied or changed as to shape, proportion, and eXact manner of assemblage without departing from the spirit thereof.

In the drawings, Figure 1 is a view in perspective of a roll constructed in accordance with the present invention. Fig. 2 is a longitudinal vertical section. Fig. 3 is a transverse sectional view.

The device consists of a body or roll 1, which is provided at its ends with centrally-disposed hubs or extensions 2, in which is housed a shaft 3. The body and hubs are preferably cast integral, and the hubs are square in crosssection, as isalso that portion of the shaft engaging the hubs and the body. The square portions of the shaft fit snugly within the longitudinal channel of the roll and are positively combined with the body through the medium of bolts or split pins A. Where bolts are employed. the free ends thereof will have anut assembled therewith, and where a split pin is employed the prongs at the free ends of the pin will be spread apart. Under this arrangement it will be seen that there will be no possibility of the shaft working out of the roll, even though it becomes loose within the channel thereof. The ends of the shaft beyond the hubs are rounded and work in suitable boxes not necessary to be shown.

' As is common with machines wherein devices such as that of the present invention are employed there will be banks or rows of them, and as this is well known detailed illustration of such arrangement is deemed unnecessary. The hub and body will preferably be made of iron and the shaft of steel; but the invention is not to be limited to the use of these combined with the hubs for securing the roll upon the shaft.

2. A crushing-roll comprising a cylindrical body portion having integral terminal hubs, the body and hubs being pierced by a channel square in cross-section, a shafthaving a portion of its length squared to engage the channel in the body and hubs, and fastening devices extending through the hubs and the shaft.

3. A crushing-roll comprising a solid cylin-. drical body portion having integral terminal my own 1 have hereto ailix'ecl my signature in the presence of two witnesses.

his THOMAS \VOODRUM.

marl;

\Vitnesses:

J. 'J. NELSON, GRACE MGCANNE. 

